EuFe_2As_2 magnetic structure determination

Details EuFe_2As_2 magnetic structure determination EuFe_2As_2 magnetic structure determination

2009-06-08

arxiv.org/abs/0906.1508v3

Physics

Condensed Matter

Strongly Correlated Electrons

accepted for publication in Phys. Rev. B

Scientific paper

Magnetic resonant X ray scattering experiments have been performed on a single crystal of EuFe_2As_2 at the Eu L_3 absorption edge. This has permitted us to determine for the first time the orientation of Eu magnetic moments in the antiferromagnetic ordered phase below T_N=19 K as parallel to the a-axis. In addition, non-resonant magnetic X ray measurements indicate that Fe magnetic moments align along the same direction in the spin density wave phase (T

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